1211862947 has 2 divisors, whose sum is σ = 1211862948. Its totient is φ = 1211862946.

The previous prime is 1211862941. The next prime is 1211862973. The reversal of 1211862947 is 7492681121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211862947 - 2⁴ = 1211862931 is a prime.

It is a super-2 number, since 2×1211862947² = 2937223604623049618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1211862941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605931473 + 605931474.

It is an arithmetic number, because the mean of its divisors is an integer number (605931474).

Almost surely, 2^1211862947 is an apocalyptic number.

1211862947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211862947 is an equidigital number, since it uses as much as digits as its factorization.

1211862947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 41.

The square root of 1211862947 is about 34811.8219431273. The cubic root of 1211862947 is about 1066.1488325130.

The spelling of 1211862947 in words is "one billion, two hundred eleven million, eight hundred sixty-two thousand, nine hundred forty-seven".